A pregnant Queens, New York, woman has disappeared under mysterious circumstances, leaving behind a worried family — and evidence of a suspicious phone call, police sources said.

Complicating the probe was an hours-long delay in the police response, with the NYPD Internal Affairs Bureau investigating why responding officers initially ruled the report unfounded.

Amarjit Kaur, 34, left her home on 128th St. near 107th Ave. in Ozone Park about 9:30 a.m. Tuesday and was supposed to pick up her twin 7-year-old sons at school in the afternoon.

She never showed up and when school officials called her husband, Lakhwinder Multani, 47, he launched his own investigation, police sources said.

“I'm worried,” Multani said. “They (police) are still working on it. They are checking every camera.”

Using a GPS, Multani found his wife’s red Mercedes parked on 113th St. at Liberty Ave. by the Chase bank where she went earlier in the day.

Multani asked workers at a nearby cell phone store to review their surveillance video, which showed Kaur, who is six weeks pregnant, parking the car at 10:30 a.m. and walking away, sources said. The car was ticketed for an expired parking meter shortly before 12:30 p.m.

Her husband called police shortly before 5 p.m.

The responding officers didn’t take a report from Multani, even though they went to more than one hospital looking for his wife.

In fact, the cops said Multani’s call was unfounded. When he heard that, Multani called IAB and police went to his home a second time, at about 1 a.m. Wednesday. Still, detectives not sent to interview him until about 4:15 a.m., Multani claims.

“The failure to take a report is under review,” said Lt. John Grimpel, a NYPD spokesman.

Kaur’s cell phone was inside her car and showed she had a phone conversation with somebody whose number the husband didn’t recognize, sources said.

He called the number and a man who answered said he was looking to collect a debt but dialed the wrong number.

The conversation lasted five minutes and police are trying to figure out if the man has anything to do with Kaur’s disappearance, sources said.

“The police have the phone number now,” Multani said.

Kaur was last seen wearing yellow pants and a black shirt. 

Police describe Kaur as about 5-foot-4, 195 pounds with a medium build. She was last seen wearing a black long sleeved shirt and yellow pants.

Kaur’s phone was found inside her car.

Anyone with information in regards to the missing person is asked to call the NYPD’s Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).  The public can also submit their tips by logging onto the Crime Stoppers website or by texting their tips to 274637 (CRIMES) then enter TIP577.